Estrogen and LH dynamics during the follicular phase of the estrous cycle in the Asian elephant
Abstract 10.1002/zoo.10098.abs Pituitary and corpus luteum hormone patterns throughout the elephant estrous cycle have been well characterized. By contrast, analysis of follicular maturation by measurement of circulating estrogens has been uninformative. This study tested the ability of a urinary estradiol-3-glucuronide radioimmunoassay to noninvasively assess follicular development during the nonluteal phase of the elephant estrous cycle, […]
Concentrations of progesterone, testosterone and estradiol-17β in the serum during the estrous cycle of Asian elephants (Elephas maximus)
Abstract 10.1002/zoo.1430100404.abs The levels of progesterone, testosterone and estradiol-17β in serum samples from two female Asian elephants were measured for the period of 32 months from February 1987 to September 1989. Serum samples were collected weekly from unanesthetized elephants. Each elephant showed eight ovarian cycles in 32 months. Ovarian cycles, characterized by changes in concentrations […]